HD Bolt Technical Details

Heavy Duty Product Specification Geomet 500B (1000 hour Salt Spray Protection)
Product Code
Bolt Size
Hole Diameter Fixing Thickness Depth Clearance

Corrosion Protection

Salt Spray (hours)




Min Max GEOMET 500B 1000Hr
HD0845ZF
M8 x 45 8 7 25 10 GEOMET 500B 1000Hr
HD1045ZF
M10 x 45 10 7 25 12 GEOMET 500B 1000Hr
HD1060ZF
M10 x 60 10 7 40 12 GEOMET 500B 1000Hr
HD1245ZF
M12 x 45 12 8 22 15 GEOMET 500B 1000Hr
HD1260ZF
M12 x 60 12 8 37 15 GEOMET 500B 1000Hr
HD1660ZF M16 x 60 16 12 30 25 GEOMET 500B 1000Hr
HD1675ZF M16 x 75 16 12 45 25 GEOMET 500B 1000Hr
HD2070ZF M20 x 70 20 15 32 30 GEOMET 500B 1000Hr
HD2085ZF M20 x 85 20 15 47 30 GEOMET 500B 1000Hr

Design Resistance for HD Type Blind Bolts
Design to BS EN 1993-1-8
GEOMET 500B HD BOLTS

Bolt Size Tensile (kN) Shear (kN) Recommended Pre-load
Tightening Torque (Nm)
M8

8.5

14.1 20
M10 25.2 22.3 35
M12 46.4 32.3 45
M16 57.5 60.1 95
 M20  77.5  94.1  120

The above resistances are equally appropriate for designs to BS 5950


Stainless Steel HD Bolts

Heavy Duty Product Specification
A4-70 STAINLESS STEEL

Product Code
Bolt Size
Hole Diameter Fixing Thickness Depth Clearance



Min Max
HD0845SS
M8 x 45 8 7 25 10
HD1045SS
M10 x 45 10 7 25 12
HD1060SS
M10 x 60 10 7 40 12
HD1245SS
M12 x 45 12 8 22 15
HD1260SS
M12 x 60 12 8 37 15
HD1660SS M16 x 60 16 12 30 25
HD2070SS M20 x 70 20 15 32 30

Design Resistance for HD Type Blind Bolts
Design to BS EN 1993-1-8
A4-70 STAINLESS STEEL

Bolt Size Tensile (kN) Shear (kN) Recommended Pre-load
Tightening Torque (Nm)
M8

10.5

12.9 18
M10 20.2 20.0 24
M12 31.4 29.5 30
M16 40.1 41.5 45
M20 68.7 75.2 80

The above resistances are equally appropriate for designs to BS 5950

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